Transcription of Power Semiconductor Devices - Pearson UK
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Power Semiconductor Devices - Pearson UK
1 CHAPTER1 Power Semiconductor INTRODUCTIONP ower Semiconductor Devices constitute the heart of modern Power electronic are used in Power electronic converters in the form of a matrix of on-off switches, and helpto convert Power from ac-to-dc (rectifier), dc-to-dc (chopper), dc-to-ac (inverter), and ac-to-ac atthe same (ac controller) or different frequencies (cycloconverter). The switching mode powerconversion gives high efficiency, but the disadvantage is that due to the nonlinearity of switches,harmonics are generated at both the supply and load sides. The switches are not ideal, and theyhave conduction and turn-on and turn-off switching losses. Converters are widely used in appli-cations such as heating and lighting controls, ac and dc Power supplies, electrochemical pro-cesses, dc and ac motor drives, static VAR generation, active harmonic filtering, etc.
1 C HAPTER 1 Power Semiconductor Devices 1.1 INTRODUCTION Power semiconductor devices constitute the heart of modern power electronic apparatus. They are used in power electronic converters in the form of a matrix of on-off switches, and help
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